İleri düzey malzemeler

Dewaxing Furnaces Electrically Heated

N 300/WAX

Grid bottom

Drain pan in floor

Drawer for collection of liquid wax

N 100/WAX - N 2200/WAX with Electrical Heating

These dewaxing furnaces are especially designed for dewaxing and subsequent firing of the ceramic form. The electrically heated models are operated below the ignition point of the wax during dewaxing. The furnaces have a heated stainless steel drain in the bottom of the furnace chamber, formed as a funnel with the discharge near the center of the furnace.The stainless steel grids in the bottom can be removed for cleaning . There is a tight stainless steel container under the dewaxing furnace with a removable drawer for wax collection. After the dewaxing process is finished the furnace continues heating in order to sinter the molds.

Tmax 850 °C

Chamber furnace with wide-opening swinging door

Four side heating with freely radiating heating elements on ceramic carrier tubes

Heated drainage in floor, controlled by a separate controller up to a maximum of 200 °C, to reliably prevent freezing of the draining wax - Release of furnace heating only possible after drain temperature is reached, to prevent clogging

Removable base included in delivery (fixed base for models N 440 and larger)

First over-temperature limiter which must be set below the ignition point of the wax and prevents the wax from igniting during dewaxing. It is customers responsibility to set the required time interwal for dewaxing. After this time has elapsed the over-temperature limiter will be deactivated to make sure that the furnace can continue with the sintering process.

Second over-temperature limiter with adjustable cutout temperature for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the furnace and load

Defined application within the constraints of the operating instructions

Dewaxing Furnaces Gas-Fired

NB 300/BOWAX

NB 300/BOWAX

NB 300/BOWAX with Gas-Fired

The chamber furnace of NB .. BOWAX series is suitable for Flash Fire processes in which the hot furnace is charged with raping castings. For a quick loading and unloading, the furnace is equipped with a pneumatic lift door, which is controlled via a footswitch. After charging, the wax liquefies in short time. The first part of the wax flows-out through the integrated pan directly into a catch basin under the furnace and is collected safely in a water tank. The remainder of the wax evaporates in the oven chamber and is burned safely in the downstream thermal afterburning. The resulting exhaust air is conducted via an exhaust chimney and a secondary customer side piping out of the hall. In the event of a flame failure of the burner or gas shortage takes place a process termination.

Tmax 1000 °C

Standard size with 300 l furnace volume, other sizes on request

Fully automatic temperature control

Integrated thermal afterburner incl. Exhaust hood (250 mm)

Gas burner for operation with natural of LPG gas with permanent monitoring via a PLC

Multilayer insulation with light-weight refractory bricks and special backing insulation

Pneumatic lift-door with foot-switch and electromagnetic locking

Withdrawable wax collecting pan under the furnace

Optical indication when charging temperature has been reached

Detailed description of safety functions

Defined application within the constraints of the operating instructions

Model

Tmax

Inner dimensions in mm

Volume

Outer dimensions in mm

Max. drain-off volume

Heating power

Electrical

°C

w

d

h

in l

W

D

H

in l

in kW1

connection*

NB 300/BOWAX

1000

550

700

780

300

1010

1700

3030

2

100,0

3-phase

1Depending on furnace design connected load might be higher *Please see page 77 for more information about supply voltage